Survey-post



A. W. ALBRECHT.

SURVEY POST.

APPLICATION FILED 001.9. 1919'.

Patented June 29, 1920.

UNITED STATES PATENT omcs.

ALBERT W. ALBRECHT, OF ST. LOUIS, MISSOURI.

SURVEY-POST.

To all whom it may concern:

Be it known that I, ALBERT W. ALBRECHT, a citizen of the United States, .residing in the city of St. Louis and the State of Missouri, have invented a new and useful Improvement in Survey-Posts, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to posts used for marking boundaries determined by surveys or fixing points, such as corners, where two or more survey lines meet. The object of my invention is to provide a metal post which may be securely anchored in the ground and which will be provided with a.

head affixed to the upper end of the post which can not be easily removed; and a further object of my invention is to provide a metal post with means. whereby a concrete-like core placed in the post will be prevented from being displaced.

My invention is fully shown in the accompanying drawings where similar letters are used to designate similar parts. Figure 1 is a plan view showing the head of the post when looked at from above; Fig. 2 is a View of the post as it appears when placed in the ground; and Fig. 3 is a longitudinal medial section of the post shown in Fig. 2.

Referring to the figures, A is a metal tube which forms the main body of the post and which has at its upper end a plurality of fingers B formed by splitting the end of the post longitudinally. The post shown in.

the drawings has four fingers, and while this is the preferred number, I do not intend that my post be limited to this number of fingers. The lower end of the post is provided with an anchor having outwardly pro-- jecting prongs C formed by splitting the lower end of the tube and deforming it by bending the walls outwardly. As many of these prongs C may be formed as are desired, but I have found that two prongs are sufficient. E is a metal cap which has an annular cavity F formed between the internal downwardly projecting lug G and the dependent skirt H. The ends of the fingers B are adapted to enter the cavity F, and when the head is forced onto the end of the tube A the fingers B are deformed and bent and clenched upon the Walls of the cavity so that the head E is retained on.

tube, and the inwardly on the surveyed line gives rigidity I Specification of Letters Patent. 7 Pate t d Ju 29 1920 Application filed October 9, 1919. Serial No. 329,551.

the end of the tube by the deformationof the upper end thereof. The wall of the tube A s deformed at one or more places in its lengthso as to provide inwardly extending pro ect10ns D. L is a concrete-like core formed, preferably, of cement, sand and broken stone mixed with water and poured into the tube A and allowed to set.- When the core is placed in the tube it fills the extending projections D engage with the core in such a manner that after the core has become hard or has set from being displaced. When in use the post is placed in a hole dug in the ground and in which earth is packed around the post so as to allow the head E to project above the surface K of the earth a suitable distance. The walls of the cavity F must be so shaped and placed with respect to one another that when the head is forced upon the end of the tube the bent by contact with the Walls of said cavity. The 'top of the head ma be provided with a cross such as shown in Eig. 1, or any other suitable mark to indicate the exact point which it is desired to fix or designate.

The prongs C prevent the post from bein withdrawn from the earth, and the core 1% and strength to the wall of the tube A. 1

It is evident that the dimensions of the various parts of the post may be made whatever is thought desirable or necessary to suit the requirements of different conditions, and the material used for the tube A or for the cap E may be whatever is suitable or necessary for different surveys or locations.

What I claim as new and desire to secure by Letters Patent, is:

1. A survey post comprising a metal tube, a metal cap having a cavity of annular cross-section and adapted to receive the end of said tube, the inner and outer Walls of said cavity being so shaped and positioned with respect to each other that said inner wall will act on said tube to cause the wall thereof to be bent outwardly and clenched on said outer wall of said cavity when said cap is forced onto said upper end of said tube.

2. A survey post comprising a metal tube having its upper end split longitudinally the projections D prevent the core I to form a plurality of fingers, a metal cap having a cavity with inner and outer walls and adapted to receive said fingers, the inner and outer walls of said cavity being so shaped and positioned with respect to each other that said inner wall will act on said fingers to cause said'fingers to be bent outwardly and clenched on said outer wall of said cavity when said cap is torced onto said upper end of said tube.

3. A survey post comprising a metal-tube, a metal cap having a cavity adapted to receive the upper end of said tube, means formed integral with said cap whereby thewalls of said tube are bent and clenched against the walls of said cavity when said cap is forced onto said tube, a concrete-like core in said tube, the walls of said tube bein deformed at one or more places to provide inwardly extending projections whereby said core is engaged and prevented from being displaced.

4. A survey post comprising a metal tube having its upper end split longitudinally to r'orm a plurality of fingers, a metal cap having an annular cavity adapted to receive said fingers, said cavity'having walls so shaped and positioned with respect to one another as to cause said fingers to be bent and clenched thereon when said fingers are forced into said cavity, a concrete-like core in said tube, the wall of said tube being deformed at one or more places to provide inwardly extending projections whereby said core is engaged and prevented from being displaced.

In witness whereof I have signed my name to this specification.

ALBERT W. V ALBRECHT. 

